The first and third one look pretty cool.
I'd choose from those two.
1.) looks oddly blurry, and some layer effects and it would be much nicer (aka image - apply image then sharpen it and duplicate and add a softlighted glausian blurred version over top)
2.) i argued aginst this in another thread....C4D renders are not meant to be the actual background, they are meant to add effects to your background already created...dont use that one (partially the same with the 1st one :/)
3.) 3rd is...iono dont use the 3rd
4.) use that on, it actually looks nice (in exception to the hair cutoff at teh top)